Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Siluridae
Etymology: Kryptopterus: Greek, kryptos = hidden + Greek, pteron = wing. Fin (Ref. 45335); geminus: From the Latin geminus, meaning twin-born; in allusion to the close morphological similarity with Kryptopterus cryptopterus.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; demersal. Tropical
Asia: Mekong, Mae Khlong, Bang Pakong and Chao Phraya River drainages in mainland Southeast Asia. Previously misidentified as Kryptopterus cryptopterus from Malay Peninsula, Java, Sumatra and Borneo.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 17.1 cm SL male/unsexed; (Ref. 50583)
Occurs in large rivers with turbid waters (Ref. 27732) and in streams and canals (Ref. 12693). Feeds on fish, prawns, insects and their larvae (Ref. 12693). Spawns during the early part of the rainy season. The young move toward the seasonally flooded habitats and are first seen in August. Marketed fresh or smoked on a skewer.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ng, H.H., 2003. Kryptopterus geminus, a new silurid catfish (Teleostei: Siluridae) from mainland Southeast Asia. Zootaxa 305:1-11. (Ref. 50583)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Fisheries: commercial; aquarium: commercial
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00575 (0.00283 - 0.01169), b=3.00 (2.83 - 3.17), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.0 ±0.6 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .